today mitt romney appears to be losing ground in ohio. today's "new york times" cbs poll finds romney trailing president obama by 10% in ohio. but that's not all. romney trails the president by 12% in pennsylvania and by 9% in florida. as you might know, these are all key swing states. analysts blame the slide on the leaked video in which he disparaged americans for paying no income tax, something he is addressing in a new ad campaign. >> president obama and i both care about poor and middle class families. the difference is my policies will make things better for them. >> i don't believe we can get very far with leaders who write off half the nation as a bunch of victims. >> ohio is key, and they are both campaigning in ohio today. the candidates had different targets in that state. romney went after working class voters while president obama rallied at two colleges. early voting has already begun in more than two dozen states. >>> plus, still ahead here at 5:00, a health warning for a bay area city not used to that type of threat. >>> a